[Wowfunhappy]

Won't webm be more efficient than h264? (I'm assuming by mp4 you mean h264).

So you'd want to do webm → mp4/h264 → gif.

(I agree this isn't worth the time to set up in most cases)

[s_y_n_t_a_x]

You're right, you would try WebM first. Like I said I'm not sure why you'd do both. Anything that plays VP8/9 should play h.264.